Auger.



A. L. WARREN.

AUGER.

APPLICATION FILED 1IIII.3. Isn.

1,293,265, Peteueed Feb. e, 1919.

ALBERT LEE WARREN, 0F RAY, ARIZONA.

AUGER.

Specification of Letters Patent.

Patented Feb. 4t, 1919.

Application led January 3, 1917. Serial No. 140,383.

To all whom t may concern Be it known that I, AIBERT Lun WARREN, citizen of the United States, residing at Ray,

in the county of Pinal and State of Arizona,

have invented new and useful Improvements in Angers, of which the following is a speciiication.

This invention relates to augers designed for cutting mortises, and its object is to provide a simple and eiiicient device of this kind composed of a pair of rotary mortising cutters associated with an ordinary auger, the structure being such that the inortising cut` ters can be readily Vapplied to the auger.

In order that the invention may be better understood, reference is had to the accom panying drawing forming a part of this specification, and in said drawing- Figure 1 is an elevation of the invention, partly in section;

Fig. 2 is a section-on the line 2 2 of Fig. 3, and

Fig. 3 is an enlarged horizontal section on the line 3 3 of F ig. 1.

Referring specifically to the drawing, the invention is shown applied to an auger of conventional design having a stem 5 provided with a spiral thread 6 wrapped around the same, with a screw point 7 at the outer end of the stem, and cutting lips 8 adjacent to the said point.

The mortising cutters are located just back of the cutting lips 8, and two of such cutters are provided, they being mounted on opposide sides of the stem 5. -In order to accommodate the cutters the thread 6 stops short of the cutting lips 8 leaving the stein 5 blank and devoid of a thread here.

Each mortising cutter is in the form of a wheel 9 having outstanding blades 10 on its periphery. The cutter is rotatably mounted on a support carried by the stern 5. This support is in the form of a split sleeve 11 loosely encircling the stem 5 and having diametrically opposite outstanding shaft exten sions 12 on which the cutting wheels are mounted to turn freely thereon. The two sections of the sleeve are clamped together by screws 13 passing through said sections and drawing the same together. Each sleeve section has lateral extensions, and when the sections are assembled said extensions come together and form shafts on which the cutter wheels are rotatably mounted. The cutter wheels are held on the shafts by any suitable means such as cotter pins 14 and washers l5.

The inner face or side of each cutter wheel 9 has bevel gear teeth 16, and these teeth of both wheels are in mesh with a bevel gear 17 fast on the stem 5, said bevel gear 17 being mounted on that part of the stem 5 which is devoid of threads and which is located between the cutter wheels.

It will be seen from the foregoing that when the auger is turned and advanced through the work, the cutter wheels 9 are carried along with the auger and at the same time they are rotated about their axles to cut a mortise.

The outer faces of the cutter wheels have recesses 18 in which the fastening devices 14 and 15 are housed, leaving the said face smooth and devoid of projecting parts. The auger stem 5 turns in the sleeve 11, in view of which it will be seen that the cutting wheels 9 do not revolve with the stem but rotate about their own axes only. In order to prevent the sleeve from slipping up or down on the stem, the latter has an annular groove 19 in which the sleeve seats.

I claim The combination with an auger comprising a stem having a spiral thread wrapped around the same, and provided with a screw point and cutting lips back of the screw point, the thread terminating short of the cutting lips to leave a portion of the stem back of Said cutting lips blank, said blank portion having an annular groove, a split sleeve loosely mounted in the groove and having outstanding shaft extensions, means for connecting the sleeve sections, rotary mortising cutters mounted on the shaft extensions and having bevel gear teeth on their inner faces, and a bevel gear on the stein and in mesh with the gear teeth of the cutters.

In testimony whereof I atlix my signature.

ALBERT LEE WARREN.

Copies of this patent may be obtained forve cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

